<template>
  <section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">硅谷外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{on:loginWay}" @click="loginWay=true">短信登录</a>
          <a href="javascript:;" :class="{on:!loginWay}" @click="loginWay=false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form>
          <div :class="{on:loginWay}">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号" v-model="phone" />
              <button
                :disabled="!rightPhone"
                class="get_verification"
                :class="{'right_phone':rightPhone}"
                @click.prevent="getCode"
              >{{computeTime>0?`(${computeTime}S)`:'获取验证码'}}</button>
            </section>
            <section class="login_verification">
              <input type="text" maxlength="8" placeholder="验证码" v-model="code" />
            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <div :class="{on:!loginWay}">
            <section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name" />
              </section>
              <section class="login_verification">
                <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd" />
                <input type="password" maxlength="8" placeholder="密码" v-else v-model="pwd" />
                <div class="switch_button" :class="showPwd?'on':'off'" @click="showPwd = !showPwd">
                  <div class="switch_circle" :class="{right:showPwd}"></div>
                  <span class="switch_text">{{showPwd?'abc':'...'}}</span>
                </div>
              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="captcha" />
                <img
                  class="get_verification"
                  :src="captchaImgUrl"
                  alt="captcha"
                  @click="getCaptcha"
                />
              </section>
            </section>
          </div>
          <button class="login_submit" @click="login">登录</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <a href="javascript:" class="go_back" @click="$router.go(-1)">
        <i class="iconfont icon-jiantou2"></i>
      </a>
    </div>
    <AlertTip :alertText="alertText" @closeTip="closeTip" v-show="isAlertShow"></AlertTip>
  </section>
</template>

<script>
import AlertTip from "@/components/AlertTip/AlertTip";
import { reqSendCode, reqPwdLogin, reqSmsLogin } from "@/api/index.js";
export default {
  components: {
    AlertTip
  },
  data() {
    return {
      loginWay: true, //true代表短信登录，false代表密码登录
      computeTime: 0, //计时器时间
      showPwd: false, //默认不显示密码
      phone: "", // 手机号
      code: "", // 短信验证码
      name: "", // 用户名
      pwd: "", // 密码
      captcha: "", // 图形验证码
      alertText: "", //提示文字
      isAlertShow: false, //默认隐藏
      captchaImgUrl: "http://localhost:4000/captcha" //验证码请求地址
    };
  },
  methods: {
    //异步获取验证码
    async getCode() {
      //启用倒计时
      if (this.computeTime == 0) {
        // 如果当前没有计时
        this.computeTime = 60;
        this.timer = setInterval(() => {
          this.computeTime--;
          if (this.computeTime <= 0) {
            clearInterval(this.timer);
          }
        }, 1000);
      }

      //向后台发送请求
      let result = await reqSendCode(this.phone);
      //请求失败弹提示
      if (result.code === 1) {
        this.AlertShow(result.msg);
      }
      if (this.computeTime) {
        this.computeTime = 0;
        //停止计时器
        clearInterval(this.timer);
        this.timer = undefined;
      }
    },
    /* 异步登录 */
    async login() {
      //前段做验证，减少服务器的压力
      let { phone, code, name, pwd, captcha, rightPhone, loginWay } = this;
      let result = {};
      if (loginWay) {
        //短信登录
        if (!rightPhone) {
          //手机号不正确
          return this.AlertShow("手机号不正确");
        } else if (!/^\d{6}$/.test(code)) {
          //验证码必须是六位
          return this.AlertShow("验证码必须是六位");
        }
        result = await reqSmsLogin(phone, code);
      } else {
        //密码登录
        if (!name) {
          // 手机/邮箱/用户名不能为空
          return this.AlertShow("手机/邮箱/用户名不能为空");
        } else if (!pwd) {
          //密码不能为空
          return this.AlertShow("密码不能为空");
        } else if (!captcha) {
          //验证码不能为空
          return this.AlertShow("验证码不能为空");
        }
        result = await reqPwdLogin({ name, pwd, captcha });
      }

      // 两种登录方式返回的结果处理一样，所以提到最后统一操作
      if (result.code === 0) {//登录成功
        // 1.保存user到vuex
        this.$store.dispatch('recordUser',result.user)
        // 2.跳转页面
        this.$router.replace('/profile')
      } else if(result.code===1) {//登录失败
        //1.重置二维码
        this.getCaptcha()
        //2.清除定时器
        if (this.computeTime) {
          this.computeTime = 0;
          //停止计时器
          clearInterval(this.timer);
          this.timer = undefined;
        }
        //3.弹失败提示
        this.closeTip(result.msg);
      }
    },
    AlertShow(text) {
      this.isAlertShow = true;
      this.alertText = text;
    },
    /* 关闭警告框 */
    closeTip() {
      this.isAlertShow = false;
      this.alertText = "text";
    },
    /* 获取一个新的图片验证码 */
    getCaptcha() {
      let timetamp = Number(new Date());
      this.captchaImgUrl = "http://localhost:4000/captcha?time=" + timetamp;
    }
  },
  computed: {
    rightPhone() {
      //制定一个验证手机号的正则
      let reg = /^((13[0-9])|(17[0-1,6-8])|(15[^4,\\D])|(18[0-9]))\d{8}$/;
      //此处返回一个boolean值
      return reg.test(this.phone);
    }
  }
};
</script>

<style lang="stylus">
.loginContainer {
  width: 100%;
  height: 100%;
  background: #fff;

  .loginInner {
    padding-top: 60px;
    width: 80%;
    margin: 0 auto;

    .login_header {
      .login_logo {
        font-size: 40px;
        font-weight: bold;
        color: #02a774;
        text-align: center;
      }

      .login_header_title {
        padding-top: 40px;
        text-align: center;

        >a {
          color: #333;
          font-size: 14px;
          padding-bottom: 4px;

          &:first-child {
            margin-right: 40px;
          }

          &.on {
            color: #02a774;
            font-weight: 700;
            border-bottom: 2px solid #02a774;
          }
        }
      }
    }

    .login_content {
      >form {
        >div {
          display: none;

          &.on {
            display: block;
          }

          input {
            width: 100%;
            height: 100%;
            padding-left: 10px;
            box-sizing: border-box;
            border: 1px solid #ddd;
            border-radius: 4px;
            outline: 0;
            font: 400 14px Arial;

            &:focus {
              border: 1px solid #02a774;
            }
          }

          .login_message {
            position: relative;
            margin-top: 16px;
            height: 48px;
            font-size: 14px;
            background: #fff;

            .get_verification {
              position: absolute;
              top: 50%;
              right: 10px;
              transform: translateY(-50%);
              border: 0;
              color: #ccc;
              font-size: 14px;
              background: transparent;
            }

            .right_phone {
              color: #000;
            }
          }

          .login_verification {
            position: relative;
            margin-top: 16px;
            height: 48px;
            font-size: 14px;
            background: #fff;

            .switch_button {
              font-size: 12px;
              border: 1px solid #ddd;
              border-radius: 8px;
              transition: background-color 0.3s, border-color 0.3s;
              padding: 0 6px;
              width: 30px;
              height: 16px;
              line-height: 16px;
              color: #fff;
              position: absolute;
              top: 50%;
              right: 10px;
              transform: translateY(-50%);

              &.off {
                background: #fff;

                .switch_text {
                  float: right;
                  color: #ddd;
                }
              }

              &.on {
                background: #02a774;
              }

              >.switch_circle {
                // transform translateX(27px)
                position: absolute;
                top: -1px;
                left: -1px;
                width: 16px;
                height: 16px;
                border: 1px solid #ddd;
                border-radius: 50%;
                background: #fff;
                box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.1);
                transition: transform 0.3s;
              }

              .right {
                transform: translateX(28px);
              }
            }
          }

          .login_hint {
            margin-top: 12px;
            color: #999;
            font-size: 14px;
            line-height: 20px;

            >a {
              color: #02a774;
            }
          }
        }

        .login_submit {
          display: block;
          width: 100%;
          height: 42px;
          margin-top: 30px;
          border-radius: 4px;
          background: #4cd96f;
          color: #fff;
          text-align: center;
          font-size: 16px;
          line-height: 42px;
          border: 0;
        }
      }

      .about_us {
        display: block;
        font-size: 12px;
        margin-top: 20px;
        text-align: center;
        color: #999;
      }
    }

    .go_back {
      position: absolute;
      top: 5px;
      left: 5px;
      width: 30px;
      height: 30px;

      >.iconfont {
        font-size: 20px;
        color: #999;
      }
    }
  }
}
</style>